/******************************
**
**	Iteracy Content Management System
**	(c) 2007 Iteracy Ltd
**	All rights reserved
**	www.iteracy.com
**
*******************************/

function preLoadImages() {
	imagesArray = new Array();
	n = 0;
	if (document.images) {
		for (i=0; i<document.images.length; i++) {
			if (document.images[i].src.indexOf("_n.png")>0) { 
				img_on = document.images[i].src;
				img_on = img_on.substring(0,img_on.length-5) + "h.png";
				imagesArray[n] = new Image();
				imagesArray[n].src = document.images[i].src;
				imagesArray[n+1] = new Image();
				imagesArray[n+1].src = img_on; 
				n = n+2;
			}
		}
	}
}


function mouseOut(imgName) {
	if (document.images) {
		img_on = document.images[imgName].src;
		document.images[imgName].src = img_on.substring(0,img_on.length-5) + "n.png";
	}
}


function mouseOver(imgName) {
	if (document.images) {	
		img_on = document.images[imgName].src;
		document.images[imgName].src = img_on.substring(0,img_on.length-5) + "h.png";
	}
}

function Element(sID) {
	// returns an element
	if (document.getElementById(sID)) {
		return document.getElementById(sID);
	} else {
		return null;
	}
}

function hideDiv(sID) {
	// hides an element
	if (Element(sID)) {
		Element(sID).style.display = "none";
	}
}

function showDiv(sID) {
	// shows an element
	if (Element(sID)) {
		Element(sID).style.display = "block";
	}
}

function showHide(sID) {
	if (Element(sID)) {
		if (Element(sID).style.display != "block") {
			showDiv(sID);
		} else {
			hideDiv(sID);
		}
	}
}

function getElementsByClassName(classname,tag) {
	if(!tag) {
		tag = "*";
	}
	var anchs =  document.getElementsByTagName(tag);
	var total_anchs = anchs.length;
	var regexp = new RegExp('\\b' + classname + '\\b');
	var class_items = new Array();
	
	for(var i=0;i<total_anchs;i++) { 
		var this_item = anchs[i];
		if(regexp.test(this_item.className)) {
			class_items.push(this_item);
		}
	}
	return class_items;
}